Wrench



L. EVANS.

WRENCH.

. rmenian men DEC. 10. 1920 PatentedJlme 21 1921.

2 SHEETS-SHEET I.

L. EVANS.

WRENCH.

APPLICATIOI'Q FILED DEC-10.1920. 3i,3@@,4i9;%u PatentedJune 21, 1921,

2 SHEETS-SHEET 2.

/ if l UNITED STATES PATENT OFFIQE.

LAFAYETTE EVANS, OF PORTSMGUTH, OHIO.

WRENCH.

To all whom it may concern Be it known that I, LAFAYETTE EVANS, a citizen of the United States of America, and resident of Portsmouth, in the county of Scioto and State of Ohio, have invented certain new and useful Improvements in Wrenches, of which the following is a specilication.

This invention relates to wrenches and particularly to ratchet wrenches, the said invention having for its object the provision of novel means whereby a handle may oscillate with relation to a wrench head, the said handle being provided with novel means for communicating motion to the head when moving in one or the other direction, according to the adjustment of a dog which coacts with ratchet teeth formed on the head.

An object of this invention is to produce a mounting for the handle whereby the said handle may rotate fully around a stud or pin carried by the head, the said head also having ratchet teeth, as stated, which may be engaged upon movement of the handle in either direction.

A still further object of this invention is to produce a head having a rigid jaw and a mounting for a movable jaw including means for moving the said movable jaw with relation to the rigid jaw.

A still further object of this invention is to produce a dog having novel means whereby the dog is oscillated to cause it to engage the ratchet teeth when moving in one or the other direction, the said adjustment being expeditiously effected.

It is furthermore an object of this invention to provide means for causing the maintenance of the adjustment of the dog.

With the foregoing and other objects in view, the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to the accompanying drawings forming part of this application wherein like characters denote corresponding parts in the several views, and in which- Figure 1 illustrates a view in elevationpartly in section of one side of the wrench; Fig. 2 illustrates a view in elevation of the opposite side thereof;

Fig. 3 illustrates a view il elevation of the edge of the wrench;

Specification of Letters Patent. Patented June 21, 19g1 Application filed December 10, 1920.

Serial No. 429,753.

tions to facilitate the application or removal of the screw 11 which is journaled in the head and is intended as a means for actuating the movable jaw 12. The head 10 has a rigid jaw 13 preferably formed integral with it, and the said head has a channel or way i l therein forming a clearance for the flange 15 of the movable jaw and the said flange has its inner edge toothed as shown at 16, the teeth of which are engaged by the screw to advance or retract the movable jaw, according to the direction of rotation of the screw. In the interests of preventing lost motion, one end of the channel l l has a groove 17 therein in which a rib 18 of the flange 15 is slidable and hence the flange of the movable jaw is caused to travel in a direct line so that the teeth of the flange are maintained in engagement with the screw. The head is provided with a boss A, the edge of which is provided with ratchet teeth B preferably having their edges undercut to form seats or engaging shoulders for the noses of a dog, as will presently appear.

A stud 19 is anchored in the head and it forms a pivot for plate 20 which is attached to the handle 21. Preferably the plate 20 has a circular flange 22 which rotates in an annular groove 23 formed in the face of the boss and the said plate is furthermorc provided with a flange 24 acting as a shield for the ratchet teeth.

The handle 21 is hollow and a pivot 25 is mounted therein, the said pivot constituting a support for the dog 26 having two tooth engaging noses 27 and 28 one of which at a time is operative to coact with the ratchet teeth of the head for rotating the head in one or another direction, according to the adjustment of the. dog.

In the handle below the dog there is located a block 29 having a recess or seat 30 in its end, the said block also having a shank 31 encircled by a spring 32 which spring bears against the lower end of the block to urge the said block toward the dog. AS

shown in. the drawing, the spring has one end seated in the bottom of the hollow portion of the handle and the spring is yieldable to permit the block to move toward and away from the dog.

A rock arm 38 has one end located in the recess of the block in which recess the said arm is oscillatable, and the end of the arm opposite the block lies in a notch or recess 34; formed in the edge of the dog, so that as the rock arm is oscillated, it swings the dog into the position shown in Fig.1 or to a position in which the opposite nose of the dog is in coactive relation to the teeth of the ratchet; When either adjustment has been attained the handle may be free to oscillate in one direction without moving the head and imparts movement to the head when moved'in the opposite direction." The rock arm has an extension 35 whichmay be manipulated for changing the position of the dog and this extension projects through an opening 36 formed in the edge of the handle. The outer end of the handle may also be hollow as shown at 3'7 and it may be closed by a cap 38 in order that the hollow portion 37 may act as a receptacle for small tools.

As shown in the drawing, the jaws have dovetail grooves 39 for holding facing blocks 10 and these facing blocks may be difierently contoured, as for instance one such facing block may have a concave face s1 ch as shown at 41 in 6, and the concave surface may be serrated as shown at 42, a construction which would be desirable'in operating on round surfaces such as pipe. The jaw faces will, of course, be provided with tongues such as 43 to fit in the grooves of the jaws and these facings may be held in place by fastenings l-l such as screws which engage coinciding recesses of the jaws and facings, which recesses would have threaded walls to engage the threads of the fasten ings. It will be obvious from what has been said that the jaws may have tastenings or r tachments which will operate as bolt or pipe dies, :1 use which will be obvious to those skilled in the art. l

The \JEBl'lCll of the invention has advantages over wrenches now in comn'ion use in that it can be operateo in conjunction with nuts that are in proximity to other parts and where it is diflicult to have access to them;

lfIn a ratchet wrench, a head having a channel therein and a rigid jaw, a handle connected to the rigid aw, a movable aw having a flange operating in the channel,

tatably mounted in the head and engaging the teeth for moving the jaw, a boss projecting from the side of the head, ratchet teeth on the edge of said boss, the said boss having an annular groove in its face, a plate having a flange guided by the annular groove and a flange at its edge covering the ratchet teeth, a stud projecting from the boss on which the plate is rotatably mounted, a dog, iii-cans t'or pivotally mounting the dog in the handle for engagement with the ratchet teeth, the said dog having an extension be yond the pivot with its edges adapted to en'- the inner wall of the handle, a rock arm engaging the edge of the dogto move it from one position to another, ahead in which the rock arm oscillate-able, and means for urging the head toward the dog.

2. In a ratchet wrench, a head having a channel therein, one wall of the said channel having a groove, a rigid jaw on the said head, a movable jaw having a flange slidable in the channel of the head and having a rib slidable in the groove in the side wall of the channel, means for adjusting the movable jaw with relation to the stationary jaw,

a boss having peripheral teeth, a handle teeth on the edge of the flange, a screw roand whereby its edge remote from the ratchet teeth engages the interior wall of the handle, the said dog having a recess in its edge, a rock arm having one end seated in the recess of the dog, and means for yieldholding the rock arm in engagement with the dog. V

in a ratchet wrench, channel therein, one wall of the said'channel having a groove, a rigid jaw on the said he a movable jaw having a dange slidable are channel of the head and having a rib slidable in the groove in the side wall of the channel, able jaw with relation to the stationary jaw, a boss having peripheral teeth, a handle mounted for rotation on the boss, a dog in the handle, means for pivotally mounting the dog whereby it engages the ratchet teeth and whereby its edge remote from. the ratchet teeth engagesthe interior wall of the handle, the said dog having a recess in its arm having one end seated in the recess oi the dog, a head having a recess in which the rock arm 18 oscillatably mounted, and means for urging the head toward .1-

the dog.

edge, a rock LAFAYETTE Evans.

meansfor adjusting he mov-- a head having a j 

